Carburetor construction



Julie 22 1926. 1,589,762y

F. MMICK CARBURETO GONSTRUCTI ON Filed Deo. 4, 1924 Il' M. I.; I" MIb/'mlm mi f I-l 31m/wanton:

Patented June 22, 1926.

UNITED STATES PATENT OFFICE.

mi mICK, F COLUDUS, mm.

CABBUBELOB CONSTRUCTION.

Application lcd December 4, 1984. Serial lo. 758,888.

vention to present means for utilizing the 15 ordinary carburetor to attain the advantages of a fuel heater in improving the vaporizin functions.`

t is an especial aim of the invention to present a device which'may be attached to 20 the ordina carburetor to heat the fuel therein, wit out interfering with the functioning. of the usual parts found therein.

An important purpose of the invention also, is to attain the improvement in vapori- 25 zation by an ordinary carburetor in a manner novel in such appliances. That is to say, I propose to warm the entire body of fuel in the bowl of the usual carburetor, whereby the primary mixture conduit walls and jet parts are also warmed and revented from counteracting the effect soug t, in addition to the fuel being brought to a favorable temperature. Y

A further object is to 85 structure in anattachable eater unit suitable for the purpose described, which will involve a minimum of labor for its installation, and will not require high mechanical skill on the part of the person making such installation.

Additional objects, advantages and features of invention reside in the construction, arrangement and combination of parts as mayY e understood from the following description, and accompanying drawings, in which- Figurel is an elevational view of a carburetor now largely used, my invention bein incorporated therein, part of the bowl 'fil being broken away to show the heater element within the bowl;

rovide a novely Figure 2 is a view from the left of lFigure 1 showing the heater element in cross section and the float of the carburetor in lowermost l position;

Figure 3 is a horizontal section of the heater element;

Figure 4 is a fragmentary horizontal section of a modified mounting of the heater element;

Fi of a urther modication of the mounting of the heater'element.

There is illustrated a carburetor comprisre 5 is a fragmentary vertical section l ing the cast body which includes a usual arrangement of the common essential parts 1n integral form there being a primary mixture element or tube 11 extended downward within the bowl 12, the bottom of which is secured in a familiar way to 'this extension wlth the edge of the bowl' pressed upon a suitable seat provided upon the plate 13 forming part of the body=-10 and enclosing the bowl. Upon the undei` side of this plate also, a. float 14 is pivotally supported, operative to regulate the admission of fuel by the valve 15 as is well understood. y

The bowl 12 is the usual plain c lindrical pressed metal cu having a plani crm bottom 16 apertu to receive a tenon therethrough by which thenut 17 may clamp the bottom to the element 11. The 'unction of the bottom and wall of the bowl is usually rounded as at 18, and as my invention reuires to be mounted on the lower part of t e wall of the bowl, it is animportant ad- Y vantage that I am able to do so without a com licated mounting.

e attachable device in my invention includes a base 20 of insulating material (compressed ber having been emplo ed), from which a cylindrical core 21 exten s, the base having a curved face 22 corresponding to the shape of the inner surface of the wall of the bowl. The chordl of this curve subtends the axis of the core at an angle of about 52 degrees in this instance, so that `when the base is placed within the bowl and pressed snugly against the side thereof,

art 11 and the side of the bowl and obiquely from the part of the bowl wall- .the core will extend medially between the lll,

'dll

abutted. lf necessary, the base maybe additionally out away or moulded to conform to the curve 18 of the junction between the bottom and wall of the bowl. Coaxially inserted through the core there is a mounting f and terminal bolt 23, having a head 24 against the extremity of the core, and a threaded part 25 'projecting through the base a distance. The bolt is preferably rectangular where enga-ged in the core, and is preferably' cemented therein. After insertion, the threaded part of the bolt is bent to extend at right angles to the chord of the curved face 22 as shown inFigure 3. Upon' the core 2l there is wound a coil 26 of suitable resistance wire 26 and an asbestos cord 27, the cord being laid between the helices of the wire. @ne end of the wire is soldered to the head 24, while the other is secured under the head of a screw 2S engaged in the side of the base 20, which screw also retains a light contact spring 29 arranged to bear -againstl the inner surface of the rbowl and make secure electrical contact therewith. At the outer threaded part of the bolt 23 a. washer 30 of hard insulating material and two/nuts 3l are provided.

ln attaching this device, it is simply necessary to drill one hole 32 at any point in the bowl immediately above the curved junction of the wall and bottom of the bowl, that is, in a vertical part of the wall as near thebottom as practicable and usually about ve-eighthspf an inch above'the level of the bottom 16 g" adjustthe device within the bowl-with the threaded part 25 of the bolt projected through the drilled opening 32, then adjust the washer and nuts, ti htening the rst of the nuts so as to e ect a tight lit of the washer against the bowl. The washer preferably has a boss on the under side to t within the drilled hole 32' v which would be grounded on the frame of the motor, as is familiar, whereby the wire 26 maybe heated when required to warm Y the contents of thebowl and the submerged dll 'dll

arts of the carburetor. lin putting the owl in place after attachment of the device as described, the core and winding must be adjusted at the same side of the body casting ll with the float pivot and parallel to the axis of the pivot, so that the latter may have full movement to lowermost position without contacting with the coil, as shown in Figure 2.

The parts are illustrated full size as actually constructed ordinarily heretofore, and the parts should be proportioned-approximate as shown to enable ready assemblage and function with adequate marginal `allowances for errors or faults in manufacture and installation.

With the single bolt mounting described the coil will be held accurately positioned by reason of the lit lof the base to the wall ofthe bowl, and the only detail which a workman has to be particular about in attaching it is lto drill the hole 32 in the bowl at the proper-height. The hole 32 may vary somewhat in size without impairing the function or a'ecting the positioning 'of the parts detrimentally.

Should it be desired to make an independent electrical circuit with the coil without using a ground, the base may have an extension 40 at one side, as indicated in Figure .4, in which an additional assembly and post screw 4l may be provided, a second opening 4?- being required to be drilled in the bowl for installation of the device. rlhe inner end of the coil is engaged under the head of the bolt screw 41 and separate wires are,

led from the outer bolt parts 25 and 41, as before described. y

'.lhe extension froin the base may be either late-ral as indicated in Figure t or may be vertical as shown in Figure 5 at 45. ln these latter installations, the workman need only assure the proper height for the first hole drilled to receive the bolt 23-25 and then space the second hole properly therefrom in the desired direction.

After mounting the heater unit, it is desirable to make marks on the bowl and edge ofthe plate 13, which are to be alined when the cam is assembled.

manufactured and marketed in a very compact and low-cost form which may be applied to the majority of carburetors of the ordinary kinds now in use, to improve their functioning, especially in cold weather, to enable easy starting, which proves dicult very often, as well as being adapted to enable the use of` low grade lfuel satisfactorily.

l claim:

. l. ln a carburetor including a circular reservoir and a doat' pivoted at one side of -thf` bowl of a shape and having movement to lie inclined when at its lowermost position, en `attachable heater element in the form of an elongated cylinder positioned beneath the float parallel to the pivot axis ofthe doat adjacent its pivoted side, mounted within and on the reservoir wall of a size to lie clear of the float when the doat is in lowered position.

2. An attachable heater for carburetors comprising a cylindrical core having a curved end 'faceto fit the inner wall face of a carburetor bowl the axis of the core bein at an acute angle to the chord lof said en lll@ face, an exposed wire helix wound on said core, a bolt extended axially through the core, said helix electrically joined thereto at the extremity of the core, said bolt projected through the curved end face, means to insulate the bolt from a bowl, and means including the bolt to clamp the core against s.

bowl through which the bolt may be insorted, and separate means to complete an leltrical circuit to the other end of said 1 In testimony whereof I aix my signature.

FRANK MIMICK. 

